Updating Google Play app is necessary since it uses your Google account to download apps. Older versions of the app may not work and give your download http://hibbydabby.blogspot.com /2013/08/how-to-resolve-google-play-store-error-927-on-android.html" target="_blank">error 927. Also older app versions has security risks too. So you should keep this app updated always.
This APK can be installed on any android phone because its a no dpi version and it size is only 16 MB.